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Antibody responses of rural Africans (closed circles, n = 15) and Caucasians (open squares, n = 16) to parasite antigens. (A) IgM and (B) IgG response to malaria schizont. (C) IgM and (D) IgE responses to S. haematobium adult worms (SWAP) as measured by ELISA. Significant p-values are from Type I sequential sums of squares and are indicated with * (p < 0.05).
